On Wed, Nov 7, 2012 at 5:40 PM, Konrad Rzeszutek Wilk <konrad.w...@oracle.com> wrote: > > I ran in a problem with launching an 8GB guest. When launching a 4GB it worked > fine, but with 8GB I get: > > .000000] init_memory_mapping: [mem 0x1f4000000-0x1f47fffff] > [ 0.000000] [mem 0x1f4000000-0x1f47fffff] page 4k > [ 0.000000] memblock_reserve: [0x000001f311c000-0x000001f311d000] > alloc_low_pages+0x103/0x130 > [ 0.000000] memblock_reserve: [0x000001f311b000-0x000001f311c000] > alloc_low_pages+0x103/0x130 > [ 0.000000] memblock_reserve: [0x000001f311a000-0x000001f311b000] > alloc_low_pages+0x103/0x130 > [ 0.000000] memblock_reserve: [0x000001f3119000-0x000001f311a000] > alloc_low_pages+0x103/0x130 > [ 0.000000] Kernel panic - not syncing: initrd too large to handle, > disabling initrd (348401664 needed, 524288 available) > [ 0.000000] > [ 0.000000] Pid: 0, comm: swapper Not tainted > 3.7.0-rc4upstream-00042-g1b66ccf #1 > [ 0.000000] Call Trace: > [ 0.000000] [<ffffffff81633a5c>] panic+0xbf/0x1df > [ 0.000000] [<ffffffff81ac00e1>] setup_arch+0x728/0xb29 > [ 0.000000] [<ffffffff81633c48>] ? printk+0x48/0x4a > [ 0.000000] [<ffffffff81aba897>] start_kernel+0x90/0x39e > [ 0.000000] [<ffffffff81aba356>] x86_64_start_reservations+0x131/0x136 > [ 0.000000] [<ffffffff81abca38>] xen_start_kernel+0x546/0x548 >
xen memmap [ 0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable [ 0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved [ 0.000000] Xen: [mem 0x0000000000100000-0x00000001f47fffff] usable there is no hole under 4G, trigger the bug about max_low_pfn_mapped updating in add_pfn_range_mapped(). please check attached patch, that should fix the problem. then I will fold it into corresponding commit that instroduce add_pfn_range_mapped(). Thanks Yinghai
fix_max_low_pfn_mapped.patch
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